package cn.mxlshy.springcloud.loadbalance;

import lombok.Data;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * @author: 马晓亮
 * @date: 2020/8/5 17:09
 * @description:
 */
@Component
public class MyLoadBalance implements LoadBalancer{
    private final AtomicInteger atomicInteger = new AtomicInteger(0);
    public final int getAndIncrement() {
        int current;
        int next;
        do {
            current = atomicInteger.get();
            next = current > 2147483647 ? 0 : current + 1;
        } while (!atomicInteger.compareAndSet(current, next));
        System.out.println("-------------第->" + next + "<-次访问");
        return next;
    }
    @Override
    public ServiceInstance instances(List<ServiceInstance> serviceInstances) {
        int index = getAndIncrement() % serviceInstances.size();
        return serviceInstances.get(index);
    }

}
